LLVM 3.2 Improves PowerPC Compiler Support
Written by Michael Larabel in Compiler on 25 November 2012 at 05:52 AM EST. 3 Comments
In addition to featuring an auto-vectorizer, Polly optimizations, and countless other improvements, the forthcoming release of LLVM 3.2 brings numerous improvements to its PowerPC back-end.

The PowerPC back-end target with LLVM 3.2 and accompanying Clang 3.2 C/C++ compiler feature many improvements for this compiler infrastructure that's due to be released in mid-December.

Among the PowerPC LLVM enhancements is better compliance with the 64-bit PowerPC ELF ABI, better inoperability with GCC, and a number of specific PowerPC64 feature improvements.

Some of the new LLVM PowerPC features include MCJIT support. PowerPC64 relocation support and TOC handling, various fixes, improvements to spilling and reloading for vector registers, C++ exception handling, fixes for big-endian code generation bugs, implemented -integrated-as support, and IBM long double support. With LLVM 3.2 is also 32/64-bit code generation improvements and instruction scheduling support for the FreeScale E500MC and E5500 cores.

For those interested in the LLVM/Clang x86 performance with the 3.2 SVN development code compared to GCC 4.8, there are recent compiler benchmarks. ARM-based compiler benchmarks are forthcoming.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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